US1234443A

US1234443A - Polishing-machine.

Info

Publication number: US1234443A
Application number: US10407816A
Authority: US
Inventors: Hans Buerk
Original assignee: Columbus Die Tool & Machine Co
Current assignee: Columbus Die Tool & Machine Co
Priority date: 1916-06-16
Filing date: 1916-06-16
Publication date: 1917-07-24
Anticipated expiration: 1934-07-24

Description

Patented July 24, 1917.

3 SHEETS-SHEET l.

H. BUERK.

POLISHING MACHINE.

APPLICATION r|LED1uNE1s,191s.

Patented July 24, 1917.

' Ill/11111111 spas .an t f HANS BUERK, OF BUFFALO, NEW YORK, lASSIGNOR T0 THE COLUMBUS DIE, TOOL & MACHINE COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF OHIO.

IPOLISHINGMACHINE Specification of Letters Patent.

Patented Tully 21, 191?.

Application filed J' une 16, 1916. Serial No. 104,078.

10 all whom t may concern.'

Be it known that I, HANS BUERK, a c1t1- zen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful 10mprovements in Polishing-Machines, of which the following is a specification.

This invention relates to a polishing machine which is more particularly designed for polishing metal articles although the same may also be used for polishing articles or other materials. This invention has for its object the provision of means which effectively withdraw the dust, grit, lint, etc., from the vicinity of the polishing wheel during the polishing operation so as to insure the health of the operator, which means are so organized that the same may be readily adjusted to suit the size of the buiiing or polishing wheel 'employed as well as the character of the article which 1s being polished.

In the accompanying drawings:

Figure l is a front elevation, partly 1n section, of a polishing or buling machme embodying my invention. Fig. 2 1s an end elevation of the same, partly in section, and viewed from the right hand end of the machine. Fig. 3 is a vertical transverse section, on an enlarged scale, taken on line 3-3, Fig. l. Fig. 4 is a horizontal section taken on the correspondingly numbered line in Fig. 1. Fig. 5 is a fragmentary vertical longitudinal section, on an enlarged scale, taken on line 5 5, Fig. 2. Fig. 6 is a fragmentary vertical transverse section taken on the correspondingly numbered line in Fig. 1. s

Similar characters of reference indicate corresponding parts throughout the several views.

The main frame or base 1 of the machine which supports the various Working parts is made hollow and its interior is adapted to.be placed in communication with an exhausting device of any suitable character for the purpose of producing a partial vacuum in this frame and the conduits associated therewith. This may be accomplished by setting the open lower end of this frame over a conduit or passage 2 arranged in the floor 3 of the building and leading to an exhausting device, or an opening 4 and an inclined rear part 5 of the frame may be connected with this exhausting device by a conduit formed partly by an elbow or angular conduit 6 which registers with the opening 4 and may be adjusted into different positions around said opening by means of bolts 7 in order to suit the direction in which the exhaust conduit leads from the base of the machine.

On its upper part the main frame is provided with a pair of bearings 8 in which is journaled a horizontal longitudinal arbor or shaft 9 upon opposite ends of which are mounted polishing or

buffing wheels

10, 10 which may be of any suitable construction such as are now in common use for this purpose. This shaft and the polishing wheels mounted thereon are turned in the -direction of the arrow in Figs. 1 and 2 by means of a driving belt passing around a driving pulley 12 secured to the shaft 9 between its bearings which belt may be shifted upon a loose pulley 11 on this shaft when it is desired to stop the operation of the machine.

My improvements are represented in this machine in connection with both of the polishing wheels so that in ei'ect this machine is double, but in the following description of my improvements associated with one of these polishing wheels itI is to be understood that this description applies to the devices associated with both of said polishing wheels.

13, 13 represent two horizontal supporting arms which are preferably constructed in the form of circular tubes so as to serve as exhaust conduits, these arms being arranged horizontally and lengthwise of the machine and secured at their inner opposing ends to the opposite transverse sides of the main frame by means of bolts 14 or other suitable means. At their outer ends these tubular supporting arms are closed, as shown at 15 While their inner ends open into the interior of the main y-frame and their front sides are provided with passages or openings 16 through which dust, dirt, lint, etc., may be withdrawn from the vicinity of the polishing wheels and conducted through the tubular arms or conduits '13 into the main frame and thence to the exhausting device connected therewith.

Upon each of these tubular supporting arms is mounted a main suction or exhaust chamber 17 which is arranged below one of the polishing wheels. This exhaust chamber is provided on its lower rear part with a tubular hub 18 through which the outer part of one of the exhaust conduits 13 projects from side to side and lnto which the passage 16 of this conduit opens so that the interior of the exhaust chamber is placed in communication with this exhaust conduit, as shown in Figs. 3 and 4. The exhaust vchamber is held against rotation on this exhaust conduit but is free to be adjusted by means of a screw 19 engaging with a threaded opening in the rear part of the respective exhaust chamber hub and having an unthreaded inner part 20 engaging with a longitudinal slot 21 in the rear part of the companion exhaust conduit, as shown in Figs. 3 and 4. The exhaust chamber 1s provided in its upper front part with an inlet openin which communicates with the space immediately below the buiiing or polishing wheel and on its front part it is provided with an extension 22 which is capable of adjustment forwardly and hackwardly atan angle relative to the main frame or body of the exhaust chamber for the purpose of adapting the same to polishing wheels of different diameter and also to the character of the work which is being operated upon. This extension is of substantially U-shaped form in cross section and bears with its inclined bottom 23 on the adjacent inclined bottom portion 24 of the exhaust chamber while its side walls 25 project upwardly from opposite ends of the bottom 23 within the adjacent part of theside walls 61 of the exhaust chamber. Upon sliding extension backwardly or forwardly the inlet ca acity of the exhaust chamber fore and all-)t of ythe machine in the plane of the bufling wheel.

may be varied to suit requirements. This extension may be held in its adjusted position in any suitable manner, for instance by the means which are shown, in the drawings and which comprise a clamping bolt 26 arranged on the bottom of the extension and projecting through a slot 27 in the bottom of the exhaust chamber and provided with a wing nut 28 bearin against the underside of the exhaust cham er, as shown in Figs. 1, 2, 3 and 5.

In order to ermit of conveniently cleaning out any dlrt, grit, lint, etc., which may become caught in the lower part of the exhaust chamber and accumulate near the same a clean-out opening 29 is provided in the lower front part of the exhaust chamber through which access may be had to the adjacent part of this chamber for cleaning urposes. This opening is normally closed y means of a door, lid or gate 30 which is pivoted by means of a hinge 31 at its lower end to the lower side of the exhaust chamber. While in its operative position this door is swung upwardly and backwardly ,away rom the same and carried oi through the exhaust chamber, exhaust conduit and main frame to the exhaust device. This hood is preferably constructed of a plurality of sections so that the same may be folded more or less and a greater or lesser number of its sections used during the operation of polishing in accordance with the character of the article or work which is being done.

As'shown in the drawings, this hood com-v prises a lower section 32 which incloses the lower rear part of the buiiing' wheel vand opens at its lower end into the upper end of the exhaust chamber, an intermediate section 33 which incloses the upper rear part of the polishing wheel and communicates at its lower end with the upper end of the lower hood-section, and an upper section 35 which incloses the upper part of the polishing wheel and the adjacent part of the intermediate section and communicates on .its underside with the latter. Thelower hood section is pivoted with its lower rear part to the upper part of the exhaust chamber by means of a horizontal longitudinal hinge 34 whereby this lower hood section may be swun forwardly and backwardly into and out o its operative position relatively to the polishing wheel. While in its forward position the lower hood section may be detachably connected with the exhaust chamber, preferably by means of a catch comprising a locking pin 36 projecting laterally from the lower front part of one of the side walls of the lowermost hood section, a locking bolt 37 arranged in a guideway 38 on the adjacent side wall of the exhaust chamber and engaging its front end to the locking pin 36 and provided at its rear end withv a handle 39 and a spring 40 arranged in the 38 and yieldingly holding the loc 'ng bolt in engagement with the locking pin 36, as shown in Figs. 1, 2 and 5.

The lower hood section preferably extends upwardly to a horizontal line passing through the axis of the polishing wheel and in its lower rear part this lower hood sec tion is provided with an upright `curved partition 41 vwhich terminates at its upper `end short of the upper end of this hood iideway ber, thereby forming an inner passageway 42 between the upper part of this partition and the adjacent peripheral part of the polishing wheel, an outer passageway 43 extending downwardly from the upper end of the inner passageway 42 to the upper part of the exhaust chamber to the top of the exhaust chamber, and a lower passageway 60 extending from the lower part of the periphery of the polishing wheel to the lower part of the exhaust chamber, as best shown ,in Fig. 3. .The upper part of the lower hood section is fitted quite close to the adjacent surfaces of the polishing .wheel for the purpose of reducing to a mmimum communication between the intermediate hood section and the lower hood sectlon on the `its axis arranged horizontally and lengthwiseJ of the machine so that the intermediate hood section may be swung forwardly and backwardly into and out of lts operatlve polsition relatively to the polishing wheel.

This intermediate section is detachably held in place relative to the lower hood section by means of a` catch which preferably is constructed like that arranged between the lower hood section and the exhaust chamber and which comprises a locking pin 45 projecting laterally from one of the slde walls of the intermediate hood sectlon, a locking bolt 46 arranged in a guideway 47 on the adjacent side wall of the lower hood section and engaging its front end with the locking pin 45 and a spring 48 arranged 1n the guideway 47 and operating to hold the locking bolt in engagement with the pin 45, as shown in Fig. 2. l

|The upper hood section 1s capable of being swung forwardly and rearwardly on the intermediate hood section for the purpose of closing the gap between the top of the polishing wheel and the intermediate hood section more or less in accordance with the character of the work which is being done and also the size of the polishing wheel which is being used. For this purpose the axis about which the upper hood section swings is of less radius than the polishing wheel and the axis of the upper hood section is arranged above the arbor 9, as shown in Figs. l and .2. The pivotal connection between the upper h ood section and the intermediate hood section preferably comprises two horizontal longitudinal pins 49,. 49 projeeting inwardly from the lower ends of the side walls of this hood section and engaging with

upright guideways

50, 50 in the adjacent parts of the side walls of the intermediate hood section, and springs 5I, 51, ar-

ranged in these guidcways and bearing against the upper sides of the pivot pins 49. On the underside of its curved top 52-the upper head section is provided with a segmental row of locking teeth 53 preferably of ratchet form one or the other of which is adapted to engage with a locking tooth 54 arranged on the upper front part of the intermediate hood section, the engagement of one or the other of the upper teeth 53 on the upper hood section with the lower tooth 54 of the intermediate section being effected by gravity vaided by the pressure of the springs 5l whereby the upper hood section is reliably held in its adjusted position. 11V hen it is desired to shift the upper hood section fore or aft the same is lifted by means of a handle 55 applied to the top thereof until its operative upper tooth is disengaged from the lower locking tooth of the intermediate hood section during which time the springs 51 are flexed. While the teeth 53 are thus disengaged the upper section may be swung forwardly and backwardly to the desired position relatively to the polishing wheel and the intermediate hood section and upon then lowering the upper hood section so that another one of its teeth 53 engages the locking tooth 54 the same will be held in this shifted position by gravity together with the pressure of the springs 51. 1n order to permit one or the other of the hoods to be cut off from the suction or exhausting device where it is not desired to use both of them this may be done by a valve 56 arranged in the exhaust conduit and operable by a handle 57 so that this valve either closes or opens this conduit.

In the operation of this polishing machine the several sections of the hood may all be used to their maximum yextent in which they inclose the upper, rear and lower parts of the polishing wheel, as shown by full lines in Figs. 2 and 3. As the polishing wheel wears awa-y so that its diameter is reduced the upper hood section may be swung forwardly and downwardly so as to close the gap between the periphery of the polishing wheel and the hood to the desired extent. By swinging the upper hood section backwardly on the intermediate hood section and swinging the intermediate hood section back- Wardly on the lower hood section and also swinging the lower hood section backwardly on the exhaust chamber a greater lor lesser number of these sections may be employed as desired and the several sections can also be moved into such a position which will permit the easy and convenient removal of the polishing wheel from the arbor and the substitution therefor of another wheel either for renewing a wheel which has become worn outor for changing the character of the wheel which is used according to the work in hand.

Between the upper rear part of the polishing wheel and the upper and rear parts of the hood is arranged a shield 58 which is preferably `curved concentrically vwith the polishing wheel and pivotally mounted at its lower end on the pintle of the hinge which connects the intermediate and lower hood sections. By means of this shield the upper and intermediate hood sections may be swung rearwardly into their inoperative position while still retaining the shield over the peripheral upper and rear parts of the polishing wheel and thereby prevent dust, dirt, or lint from flying upwardly into the face of the operator when doing certain kinds of polishing work which, however, d0 not require the use of the full exhausting effect of the hood. When this shield is not required for use the same may also be swung rearwardly together with the upper and intermediate hood sections.

In the rear part of the hood, preferably in the peripheral wall of the intermediate section thereof, the same is vprovided with a vent opening 59 which is arranged at a distance from the upper end of the inner and outer passages 42, 43. This Vent opening 59 permits the pure external air to enter the upper rear part of the hood so as to break the vacuum or suction adjacent to the periphery of the polishing wheel, thereby preventing the discharge of dust, grit and lint into the face of the operator and insuring carrying this material away by the exhaust device so that the o erator is not liable to breathe the same. rdinarily the rotation of a buiiing wheel causes a circular body or zone of air to be constantly whirled around adjacent to the periphery of the wheel by reason of the frictional contact therewith and a part of this air laden with dust, grit and lint would fly off from the front part of the wheel where the same would be inhaled by the operator and inr juriously affect his health. In the present construction a part of the dust laden air which moves downwardly on the front side of the polishing wheel after performing the polishing operation on the workpiece is carried directly through the lower passage 60 into the exhaust chamber while another part is carried rearwardly and upwardly along the lower rear part of the polishing wheel though the inner passage 42 until it reaches the upper end of the outer passage 43 where the same is forcibly drawn downwardly by the counter current of air in this outer pas- I sage to the exhaust chamber. After the periphery of the wheel passes above the axis of the saine a suction effect is exerted by the periphery-of the wheels on the external pure air entering the hood through the`vent opening 59 whereby this air is carried forwardly and downwardly to the working part of the polishing wheel on the front side thereof in- 65 stead of dragcing some of the dust laden lair to this position and delivering it inthe vicinity of the operator as has been customary heretofore. If there is any leak between the rear part of the polishing wheel and the upper end of the lower hood section and the lower end of the intermediate section a small quantity of the pure air entering through the vent opening 59 will be drawn downwardly into the rear exhaust passage 43 and to the exhaust device, thereby effectually guarding against the delivery of any air laden with dust, lint or the like to the operator andv insuring a discharge at this place of only pure air whichfis free from these deleterious ingredients.

It will be noted that a normally neutral region is by this means formed on the periphery of the polishing wheel adjacent to the vent opening at which the circular zone or current of air adjacent to the periphery of the polishing wheel divides, one branch of which is pure and passes upwardly and forwardly over the top of the polishing wheel while the other branchv carrying possible impurities passes downwardly on the rear side of the wheel opposite to the direction of rotation and both of these branches leading to the exhaust chamber and conduit with which the exhaust device is connected. This apparatus is therefore very sanitary and permits an operator to perform the usual buiing or polishing operation without impairing his health. Furthermore, this result is accomplished by means which are exceedingly simple and inexpensive and not liable to get out of order.

I claim as my invention:

1. A polishing machine comprising a rotary polishing wheel,\ and a hood inclosing the rear part of said wheel and provided in its rear part' with an air inlet opening and adapted to be connected with an exhausting device. i

2. A polishing machine comprising a rotary polishing wheel, and va hood inclosing the upper, rear and lower parts of said wheel while leaving the front part exposed and the rear part ofsaid hood being provided with an air inlet opening and its lower part being adapted to be connected with an exhaust device. Y

3. A polishing machine comprising a rotary polishing wheel, a hood inclosing the upper, rear and lower parts of said wheel while leaving the front part thereof exposed and said hood being provided in its rear part with an air inlet and also with an auxiliaryv exhaust conduit extending from the rear part of said hood downwardly, and a main.

exhaust conduit communicating with the lower end of said auxiliary conduit. y 4. A polishing machine comprising a rotary polishing wheel, and a hood inclosing part ofsaid. Wheel and adapted to be connected with an exhaust device and comprising a lower section pivoted to swing vertically on a fixed support, an intermediate section pivoted to swing vertically on the lower section, and an upper section pivoted to swing vertically on said intermediate section. y

5. A polishing machine comprising a rotary polishing wheel, and a hood inclosing part of said wheel and adapted to be connected with an exhaust device and comprising a plurality of pivotally connected sections, and a shield extending from the rear part of the wheel forwardly and upwardly over the top of the same and pivoted at its lower rear end concentrically with the pivotal connection between 'two adjacent hood sections.

6. A polishing machine comprising a rotary polishing wheel, and a hood inclosing part of said wheel and comprising a rear section extending over the rear part of the wheel and a top section extending over the top of the wheel, and means for adjusting said top section .circumferentially relatively7` to said rear section comprising a lower adjusting tooth projecting upwardly from said rear hood section, accircumferentia'l row of upper adjusting teeth projecting downwardly from said top hood section and one or the other of which is adapted to engage with said lower tooth, guideways arranged on opposite sides of said rear hood section, pins arranged on opposite sides of said top hood section and engaging with said guideways, and springs arranged in said guideways and bearing downwardly on said pins.

7. A polishing machine comprising a rotary polishing wheel, a hood inclosing part of said wheel and comprising a plurality of sections which are pivotally connected and adapted to be swung into and out of their operative position, and a catch for holding said hood sections in their operative position comprising a locking pin projecting laterally from one of said hood sections, a guideway arranged on the other hood section, a locking bolt sliding in said guideway and adapted to engage said locking pin, and a spring for holding said locking bolt yieldingly in its operative position.

8. A polishing machine comprising a polishing Wheel, an exhaust chamber arranged below said wheel and adapted to be connected with an exhaust device, and a hood inclosing part of said wheel and comprising a lower section pivoted on said chamber, and a rear section pivoted on said lower section.

9. A polishing machine comprising a polishing wheel, an exhaust chamber arranged below said wheel and adapted to be connected with an exhaust device, and a hood inclosing part of said Wheel and'comprising a lower section pivoted on said chamber, a rear section pivoted on said lower section and an upper section pivoted on said rear section.

10. A polishing machine comprising a polishing wheel, an exhaust `chamber arranged below said wheel, and adapted to be connected with an exhaust device and having an inlet on its upper side, a hood inclosing part of said wheel and opening at its lower end into the inlet of said exhaust chamber and a scoop or pan projecting from the inlet of said chamber underneath said 11. A polishing machine comprising a polishing wheel, an exhaust chamber arranged below said wheel, and adapted to be connected with an exhaust device and having an inlet on its upper side, a hood inclosing part of said Wheel and opening at its lower end into the inlet of said exhaust chamber, a scoop or pan projecting from the inlet of said chamber underneath said wheel and means for adjustably connecting said scoop and chamber.

12. A polishing machine comprising aI polishing wheel, an exhaust chamber arranged below said Wheel, and adapted to be connected with an exhaust device and having an inlet on its upper side, a hood inclosing part of said wheel'and opening ng its lower end into the inlet of said exhaust chamber, a scoop or pan projecting from the inlet of said chamber underneath said wheel and means for adjustably connecting said scoop and chamber comprising a clamping bolt arranged on thel scoop and passing through a slot in said chamber.

13. A polishing machine comprising a polishing wheel, an exhaust conduit adapted to be connected with an exhaust device and provided with an inlet opening, an exhaust chamber through which said conduit projects and which communicates with said conduit through said opening, and a hood partly inclosing said wheel an'd communi- -cating with said chamber. I

14. A polishing machine comprising a polishing Wheel, an exhaust conduit adapted to be connected with an exhaust device and provided with an inlet opening, an exhaust chamber through which said conduit projects and which communicates with said conduit through said opening, a hood partly inclosing said wheel and communicating with said chamber and means for holding said chamber against turning on said conduit.

v 15. A polishing machine comprising a polishing wheel, an exhaust conduit adapted to be connected with an exhaust device and provided with an inlet opening, an exhaust chamber through which said conduit proconduit through said opening,

jcctc ccd which ccmmuniccccc with scid a hood partly inclosing sai wheel and communicating with said chamber and means for hnlding hollow frame adapted t0 be connected with' an exhaust device, tabl y p con uit connected with said frame, ary'exhaust chamber mounted on said conduit and a polishing wheel rotamounted on sald frame, an exhaustcommunicating therewith, and a hood part-1y inclosing said wheel and communicating with said chamber. e A 17. A -polishingpmachine comprising a hollow frame adapted to be connected with an? exhaust device, a polishing wheel rotatabl mounted on said frame, an. exhaust v con uitsconn'ected with said 'frameyan exhaust chamber mounted on said conduit and communicatingl therewith, a hood partly .nclosing said w eel and communicating with said chamber and a valve arranged in said conduit between said chamber and frame. p c' HANS BUERK.